# -*- coding: utf-8 -*-
'''
爬虫url解析器
'''
from bs4 import BeautifulSoup
import re
from HTMLParser import HTMLParser
import urlparse

class HtmlParser(object):

    def _get_new_urls(self,page_url,soup):

        new_urls = set()

        links = soup.find_all('a',href=re.compile(r"/view/\d+\.htm"))
 
        for link in links:
            new_url = '/item/'+link.get_text().encode('utf-8')
            
            #需要import urlparse  但是由于有__init__ 编译不提示错误 好多这种问题

            try:
                new_full_url=urlparse.urljoin('http://baike.baidu.com',new_url)
            except:
                print "urlparse wrong"
            new_urls.add(new_full_url)

        return new_urls

    def _get_new_data(self,page_url,soup):
        res_data = {}

        #url
        res_data['url']=page_url

        #<dd class="lemmaWgt-lemmaTitle-title"><h1>***</h1> </dd>
        title_node = soup.find('dd',class_="lemmaWgt-lemmaTitle-title").find('h1')
        res_data['title'] = title_node.get_text()

        #<div class="lemma-summary" label-module="lemmaSummary">***</div>
        summary_node = soup.find('div',class_="lemma-summary")
        res_data['summary'] = summary_node.get_text()

        return res_data


    def parse(self,page_url,html_cont):
        if page_url is None or html_cont is None:
            return 

        try: 
            soup = BeautifulSoup(html_cont,'html.parser',from_encoding='utf-8')
        except:
            print "soup wrong"

        new_urls = self._get_new_urls(page_url,soup)

        new_data = self._get_new_data(page_url,soup)

        return new_urls,new_data

